Installation
30
MAXXfl o EVO
4.7.8 ROOM SEALED FLUE (C
13,
C
33
C
53
& C
63
) SYSTEM
There are four approved room sealed arrangements where both the air inlet and fl ue discharge terminate out-
side the building.
Flue and air ducts are supplied to a concentric design and are 80/125mm fl ue size. See section 4.7.10 for
component choices. Flues should slope back to the Heater by three degrees.
Terminal positions must comply with the requirements detailed in section 4.7.13
Flue type C
13
& C
33
- If separate terminal outlets are used, they shall fi t inside a square of 50cm
Flue type C
53
- Any terminal used for the separate supply of air and for the evacuation of combus-
tion products must not be installed on opposite walls of a building
Flue type C
63
- Any terminal used must comply with the requirements of BS EN 1856-1
Ensure the inner fl ue section is sealed at all joints, otherwise incomplete combustion may result. For ease of
assembly, it is recommended that a small quantity of petroleum jelly is used to lubricate each fl ue seal, before
fi tting fl ue sections together.
Any terminal
must
be fi tted with a guard if less than 2m above ground level or if it is in a position where it may
cause harm to persons as a result of touching a hot surface.
Care must be taken to avoid long horizontal runs of fl ue duct and continuous discharge of condensate from a
horizontal fl ue terminal - Ensure that the fl ue slopes back by 3
O
towards the heater
4.7.9 ROOM SEALED VENTILATION REQUIREMENTS
Where the heater is installed in a
DEDICATED PLANT ROOM
or
COMPARTMENT
no additional ventilation
should be required, provided the following ambient conditions are not exceeded:
Where the room sealed heater is installed in a boiler room with an air change rate >0.5 changes per hour, no
additional ventilation is required.
If the air change rate is less than 0.5 changes per hour, ventilation must be provided at low and high levels.
The minimum permanent free vent area is as follows:-
Air humidity
93% RH @ 25
O
C
Ambient temperature (1.5m from fl oor level)
32
O
C
Model
Min free area of high & low vent
MAXXfl o EVO 30
112cm
2
MAXXfl o EVO 60
224cm
2
